Sinclair Broadcast Group and Tribune should never be allowed to merge. If this deal goes through, a single company would own more than 200 local-TV stations reaching more than 70 percent of the country. That's far beyond the legal limits on media ownership and far too much power in the hands of a single company. Sinclair has evaded FCC rules, received FCC fines for airing propaganda, and drawn wide criticism for airing politically slanted content on its stations. The FCC should block this merger and restore policies that encourage a diversity of local media owners and a wide range of viewpoints.